Alfa IN alfin 281 w, Service Manual, Page: 21 / 25

281 T / 281 W
Ultima modifica/Last Update: 18/03/2008 Rev0 pagina 15 di 17
EXPLANATION
Check that the cables that connect the output filter board
0031 to the front panel are correctly inserted.
To check diodes remove the snubber board and carry out
the following measures with a diode tester:
At the ends of the two transils (see below) positioned on
the snubber board, “OL” must always be measured.
P
IC
T
U
R
E
1
P
IC
T
U
R
E
2
Copper
bar
Probe Copper
bar
Probe Measure
LEFT Red MID Black “OL”
LEFT Black MID Red >.150
MID Red RIGHT Black >.150
MID Black RIGHT Red “OL”
LEFT
MID
RIGHT